[Q] Cursor keys in vim?

Hiya
An odd problem I've come across a couple of times before -
when I'm in vim's insert mode, pressing the cursor keys
inserts characters A to D instead of moving the cursor.
I suspect I've misconfigured something (keyboard/charset),
can anyone tell me how to fix it?
C-YA
Jon
<http://www.dookie.demon.co.uk>